1. School Chemical and Mechanical Engineering, Woldia Institute of Technology, Woldia University, Woldia town, Ethiopia
2. Faculty Chemical and Food Engineering, Bahir Dar Institute of Technology, Bahir Dar University, Bahir dar, Ethiopia
3. Departments of Chemical Engineering, University of Gondar, Gondar, Ethiopia
4. South African Research Chair in Postharvest Technology, University of Stellenbosch, Stellenbosch town, South Africa